Sewing-machine treadle



(No Model.) l

J. R. MGCALL.

SEWING MACHINE TREADLE.

No. 361,708. Patented Apr. 26, 1887.

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, UNITED STATES PaTnNT Ottica.

JAMES R. MCCALL,IOF KALAMAZOO, MICHIGAN, -ASSIGNOR TO HIMSELF, AND

'WILLIAM M. PATTERSON AND LOUIS M. BENHAM, BOTH OF CHICAGO, v

ILLINOIS.

SEWING-MACHINE TREADLE.

SPECIFICATION forming part of Letters Patent No. 361,708, dated April 26, 1887.

Application filed February 8, 1867. Serial No. l-6,892. (No model.)

To all whom, it may concern.-

Be it known that I, JAMES R. MOCALL, a citizen of the United States, residingin Kalamazoo, in the county of Kalamazoo and State of Michigan, have invented a new and useful Improvement in Machine-Treadles, of which the following is a specification.

This invention relates to andis designed as an improvement in pendulum or swinging treadles adapted to be used with sewing and other machines; and it consists, primarily, in the novel manner or means for suspending the treadle and the adjustable features of the attaching devices, and in the novel details of construction of some of the parts.

In the accompanying drawings, which form a part of this specification, and in lwhich similar letters of reference indicate likeparts, Figure l is an elevation of a sewing-machine stand to which my invention has been applied. Fig. 2 is a partial vertical section upon the line 2 2 of Fig. l. Fig. 3 is an end and Fig. 4 a front elevation of the attaching-plate from which the treadle is suspended. Figs. 5 and G are views similar to Figs. 3 and 4, showing the supporting brackets or arms secured in place to the attaching-plate. Fig. 7 is a horizontal section on the line 7 7 of Fig. l. Fig. 8 is a detail showing the manner of pivoting the treadlesuspensories, and Fig. 9 is a detail section upon the line 9 9 of Fig. 5.

In said drawings, A represents the table, a a the iron supporting-castings, and B B the stiffening-braces between the supports of the stand of a sewing or other machine.

C is the bottom shaft, upon which the old form of rocking treadle is usually mounted, but which in this instance gives no support to the treadle.

D is the treadle plate or platform. It is rigidly bolted to depending rods d, and the latter pass through heads E, secured upon the ends of a rod, F, and rock upon the pivotal points of set-screws f. The rods arevertically adjustable in said heads and tightened therein by set-screws e. The pivotal screws f are lo cated inhorizontally-extending arms G, which are adjustable in a horizontal plane and in a line from front to back, being held to the slot .ferent positions, according to the construction 5 of the stiffening-braces. The rainbow-shaped top of plate H affords a convenient place for the name of the machine to which the invenl tion is applied.

From the construction thus described it will be seen that the treadle swings with a pendulum-like motion upon the pivotal screws f.

I will now describe the mechanism connecting the treadle with the moving parts of the machine.

J is a link loosely joined to one of the suspending-rods d, and also to a V-shaped or forked lever, K k,which is journaled upon the shaft C. From the arm 7c of this lever extends a pitman, z, which is joined to the crank L upon the ily-wheel shaft of the machine. The treadle, if moved to the left to the position indicated in Fig. 2 by dotted lines, will cause the other partsto assume the positions also shown in dotted lines in said figure, and motion is thus communicated to the crank L, a continuance of which motion is producedv by moving the treadle back and forth.

-Thc brackets g and arms G are shaped upon their abutting faces in groove-and-tenon form, so that the horizontality of the arms will be maintained.

I claim- 1. The treadle mechanism consisting of a swinging treadle-plate, adjustable suspensories 'for said plate, the link, the journaled forked lever, and the pitman, all combined and operating substantially as set forth. v

2. The swinging treadle-plate suspended by supports which are both horizontally and vertically adjustable, in combination with such supports, substantially as described.

3. In atreadle, a swinging treadle-plate and suspensories therefor, supported from the braces B B and vertically adjustable thereon, in combination with such braces, substantially as specified.

4. The swinging treadle-plate suspended by supports Which are horizontally adjustable in a line from front to back, in combination with such supports, substantially as set forth.

5. The combination,with the treadle and its suspending-rods, of the plate H, attached4 to the machine and having the brackets g, the arms G, the pivotal screws f, and the heads E, substantially as specified.

6. The combination of the slotted plate H and the hooked bolts 7L with the stiffeningbraces B of a sewing-machine stand, substantially as specified.

7. The treadle-plate, the suspension-rods d, and the heads E, in combination with therod F, pivotal screws f, and the arms in which the latter are held, substantially as specified.

8. The combination of the swinging treadlcmachina substantially as specified.

10. The combination,with the treadle-plate and its suspensories, of the attaching-plate H, adapted to be secured to different machines, substantially as specified.

JAMES R. MCCALL;

Witnesses: EDW. S'. EVAnTs, H. M. MUNDAY. 

